Maths puzzle

[Dav the wheel nut]

Just a bit of fun to impress your blonde partners.

Your Phone number will reveal your Age.


[1] Take a look at your last digit of your mobile phone number
[2] Use this figure and multiply by 2
[3] Then add 5
[4] And then multiply by 50
[5] And then add the number 1763
[6] The last step; with this number, subtract your birth year.
Now you see a three-digit number.
The first digit is the last digit of your phone number, the next digits is
your actual age.
Cool

 

[Grumpyowl]

It works

 

[dr_john]

well very impressive, but giving your birth year is a bit of a giveaway isn't it?

 

[andysat]

Freaky!

 

[Redzedfour]

Bang on

 

[budfox]

[1] Take a look at your last digit of your mobile phone number
[2] Use this figure and multiply by 2
[3] Then add 5
[4] And then multiply by 50
[5] And then add the number 1763
[6] The last step; with this number, subtract your birth year.

1 - Let's call this 'x'
2- Now we have 2x
3 - Now we have 2x+5
4 - Now we have 50(2x+5)=100x+250
5 - Now we have 100x+2013
6- Now we have 100x + your age.

"Now you see a three-digit number" - Yes we do, it's the last digit of your phone number (x) multiplied by 100. In other words, a whole number of thousands. We've then added your age to it. I think David Blaine can rest easy tonight.

 

[JaEdBa]

[1] Take a look at your last digit of your mobile phone number
[2] Use this figure and multiply by 2
[3] Then add 5
[4] And then multiply by 50
[5] And then add the number 1763
[6] The last step; with this number, subtract your birth year.

1 - Let's call this 'x'
2- Now we have 2x
3 - Now we have 2x+5
4 - Now we have 50(2x+5)=100x+250
5 - Now we have 100x+2013
6- Now we have 100x + your age.

"Now you see a three-digit number" - Yes we do, it's the last digit of your phone number (x) multiplied by 100. In other words, a whole number of thousands. We've then added your age to it. I think David Blaine can rest easy tonight.

doesn't that mean it won't work if you've already had a birthday this year...?

 

[Taz]

mine did not work

 

[budfox]

[1] Take a look at your last digit of your mobile phone number
[2] Use this figure and multiply by 2
[3] Then add 5
[4] And then multiply by 50
[5] And then add the number 1763
[6] The last step; with this number, subtract your birth year.

1 - Let's call this 'x'
2- Now we have 2x
3 - Now we have 2x+5
4 - Now we have 50(2x+5)=100x+250
5 - Now we have 100x+2013
6- Now we have 100x + your age.

"Now you see a three-digit number" - Yes we do, it's the last digit of your phone number (x) multiplied by 100. In other words, a whole number of thousands. We've then added your age to it. I think David Blaine can rest easy tonight.

doesn't that mean it won't work if you've already had a birthday this year...?

Yes it does, but then even a broken clock is right twice per day.